{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xaea4ce93f87c9585befb462cc73fccb143206ffb05aef850a30639d49ab70654",
    "signature": "0x04538633774d45c5d6728f15cdbb874c0c50a5a7881a196d50c573d2a83175ca24eaf9c49ab9253652939a86b25a083d9bafab9b559c77a3aec89c254ab028c81b",
    "signer": "0x204ac030AeCcD7748FDe06DEd2F1C858Ac9b5bAC",
    "userId": "554071215"
  }
}